Department Of Transportation Uniform Tire Quality Grades

The following tire grading categories were established by the National Highway Traffic Safety Administration. The specific grade rating assigned by the tire’s manufacturer in each category is shown on the sidewall of the tires on your vehicle.

All passenger car tires must conform to Federal safety requirements in addition to these grades.

See also:

Wind Buffeting
Wind buffeting can be described as the perception of pressure on the ears or a helicopter-type sound in the ears. Your vehicle may exhibit wind buffeting with the windows down, or the sunroof (i ...

Supplemental Seat-Mounted Side Air Bag (SAB) Inflator Units
The Supplemental Seat-Mounted Side Air Bags (SAB) are designed to activate only in certain side collisions. The ORC determines if a side collision requires the side air bags to inflate, based on ...

To Vary The Speed Setting
When the Electronic Speed Control is set, you can increase speed by pushing the RES (+) button. If the button is continually pressed, the set speed will continue to increase until the button is ...